Heat-sealable packaging material
AssigneeStora Enso OYJ
InventorsKaj Backfolk, Isto Heiskanen, Esa Saukkonen, Jukka Kankkunen
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a packaging material free from aluminium in the form of a continuous foil or film, comprising a layer of microfibrillated cellulose (MFC), wherein the layer comprising MFC has been laminated or coated on at least one side with a heat-sealable material. The MFC layer contains at least 60% by weight of microfibrillated cellulose. The present invention is also directed to a method for induction sealing, wherein a packaging material to be heat-sealed by induction is placed against an induction heating surface.
Claims9
A heat-sealable packaging material, free from aluminum in the form of a continuous foil or film, the heat-sealable packaging material comprising:
- a layer that comprises at least 60% by weight of microfibrillated cellulose,
- wherein the layer comprising at least 60% by weight of microfibrillated cellulose is laminated or coated with a heat-sealable material,
- wherein a thickness of the heat-sealable packaging material is less than 70 μm, and
- wherein at least one side of the heat-sealable packaging material is provided with a coating that prevents the at least one side form adhering to a heated metal surface selected from a group consisting of starch, a wax, a mineral coating, or pigment coating.
Dependencies are inferred from the claim text.